Lumpkin, Thomas A.
Azolla as a green manure use and management in crop production Thomas A. Lumpkin and Donald L. Plucknett - Boulder, Colo. Westview Press 1982 - xx, 230 p. ill. - Westview tropical agriculture series no. 5 .
Green manuring
Azolla as a green manure use and management in crop production Thomas A. Lumpkin and Donald L. Plucknett - Boulder, Colo. Westview Press 1982 - xx, 230 p. ill. - Westview tropical agriculture series no. 5 .
Green manuring